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N. PETERS. PHOTO-LITNOGRAPMEH. WASHINGTON, D C.

@uiten tat/rs' gat-rut @frn NICHOLAS LUMSDEN, OFSANFRANGISCO,CALIFORNIA.

Letters Patent No. 78,385, dated llfag/ 26, 1868.

IMPROVEMENT IN BOOTS AND SHOES.

TO'ALL WIIOM' IT MAY CONCERN Be it ltnown that I, NICHOLAS LUMSDEN, of'the" city and county of San Francisco, State of California, haveinvented an Improved Machine for Making Screwed Boots and Slices onUnplated Lasts and I do hereby declare the following description andaccompanying drawings are suicient to enable any person skilled in theart or science to which it most nearly appertains to make and usemyfsaid invention or improvements without further Invention' orexperiment. X

The nature o'f my invention consists in providing an improved maehineforthe manufacture of screwed boots and shoes on unpla-ted lasts, theobject being, first, to' construct a. gauge, by Vwhich the length ofthescrew, and the depth to which it penetrates, shall be regulated, sothat it will not be necessary te plate the last with metal to stop thescrew; second, a clamp, so made as `to secure the wire firmly while thescrew is being cut, and yet be easily disengaged when necessary.

It also consists in a movable support for the last, which can beoperated by the foot, to withdraw the last- 4from the machine, while hymeans of a slide and av series of adjustable turning joints, the last iseasily moved' and turned into any position for rec'eiving the screws.

'Reference being had to the accompanying drawings, forming a partfofthis speciication- Figure 1 is a side elevation of the machinc,.withsection showing the clamp and the withdrawing-spring.

FigureZ is a. top view. a

Figure 3 is a view of the screw-plate and the cutter.

Similar letters' of reference in each of the figures indicate likeparts. i

A is a block or frame, firmly attached to the bench, and through whichthe shaft B passes, supporting the gear-wheel C. This wheel turns thepinion D, which is irmly fastened toy the arbor E, which is made hollow,in order to allow the wire F, ot' which the screws are made,A to pass.The lower part of the arborEis made tapering, having a screw cut on theoutside, and is dividedinto four parts by slots, as shown at G. Anut, H,screws on the bottom of the arbor, and as =it is turned up ou thetapering screw, it compresses the sides and presses them firmly againstthc wire F, thus holding it in place, and preventing its turning as thescrewis cut by the plate I.

When it is necessary to loosen the wire, to lpush it` downfor anotherscrew, the pin J is pushed forward, s as to prevent the wheel C fromturning. The nut-H can then be loosened, and the wiremoved.

Beneath the screw-plate I is a cutter, operated by the handles K K, asshown in fig. 3, and which cuts off the screw after it is driven throughthe sole.

The 'depth towhich the screw penetrates is determined by means of a r'odor bar, L. This bar is attached to the screw-plate, and slidesperpendicularly through the block A. A nut, M, at the top, is adjustedso that, when the screw is driven as far as desired, it will be stoppedby the nut M coming in Contact with the block A. The nut M muy be movedup or down, and thus easily regulate the length of the screw. l

The last is mounted upon a standard, and is moved from yside to side bya joint at N. The upper part, O, of this standard has three angularfaces, a a a, cut at the lower end. The screw P has one side made dat,as at e, and, when this dat side is presented to the faces a et, thepart O can be moved from side to side.

By turning the screw, when either of the faces are presented, the lastwill be held firmly in eitherposition The motion forward and back aboutthe joint R, is regulated by a nut or button, S, which engages the teethd and thus holds the last at the desired angle.

The bottom of the standard slides along the horizontal bar T, aud thusgives the last a similar movement;

A perpendicular bur, V, passes through'the bar T, and has anoperating-rod attached to the bottom, by which the last is removed fromthe screw-plate. A spiral spring, W, serves to retain the last incontact with the screwplate, with suiiicient force to make the screwsenter the leather when they are turned.

A wooden cylinder, y, moving inside a hollow barrel, t, guides theapparatus, and keeps its motion in a perpendicular line. The spring Wand the eylin'derg areattached to the plate m, which is firmly ixedtothe bench,

`and the rod or bar V moves through the centre.

Having thus described my invention, whettI cloim, and desireto-secure byLetters Patent, is

1. The regulating-guide, consisting of the sliding rod L and itsadjustable nut M, together with the screwplate I and the wire-holdingrclamp, the whole constructed and operating substantially as and for thepurpose described. i

2. The adjustable last-standard, constructed and operatingsubstantallyus and for the purpose described.

3. The device, consisting of the spring W, rod, cylinder g, and barrelL, for obtaining a. perpendicular motionof the last, Vsind a. pressureagainst the screwplute, substantially as and for the purposedescribed.

In witness whereof, I have hereunto set my ,hand und seal.

NICHOLAS LUMSDEN. [1.. 8.]

Witnesses y JN0. L. Booms," C. W. M. SMITH.

